I've been curious about this too. I've seen the curved ones on some trucks and straight ones on others. The one that came with my '46 did not have the curve, but had several bends in places consistent with damage. That was "repaired". When I assembled the front sheet metal to check for fit, prior to more body work, everything fit fine, including hood latching. I have wondered if there were different air cleaners used. Sparky is a 1/2 ton and came with an oil bath air cleaner. I''ve seen both straight and curved listed for sale and wondered about the differences.
My '37 also has a straight v-Rod and same air cleaner type.
